Exploring fish assemblage structure, feeding guild, and water quality in a typical river-reservoir interface of tropical large reservoir environment, Central India

Effect of environmental drivers of fish assemblage and diversity patterns in temporal scale in Mongra Reservoir: A case study from one of the tributaries of Mahanadi Basin, Central India

“…Stable and balanced ecosystems have a rich species assemblage, as shown by the high positive connection between Shannon diversity (H′) and Margalef species richness (r = 0.996). Similar observations were documented by Mukherjee et al (2013) in Matlah River system, Raveendar et al (2018) in Nanaksagar reservoir, Johnson et al (2021) in Halali Reservoir, Gogoi et al (2022) in canals of Sunderban and Koushlesh et al (2022) in Sardar Sarovar Reservoir.…”

“…It may be attributed to the effect of post‐monsoon season's lower mean water temperature on gas solubility and retention and the mixing of monsoon rainfall during the monsoon and post‐monsoon seasons. Similar results were found by Singh and Rai (1999) in the Ganga River; Hiware and Jadhav (2001) in the Manjar River; Rafeeq and Khan (2002) in the Godavari River; Tamot and Mishra (2008) and Johnson et al (2021) in the Halali Reservoir; and Koushlesh et al (2022) in the Sardar Sarovar reservoir. Winter dissolved oxygen saturation in Finland boreal rivers has affected the fish assemblages as reported by Sutela et al (2010).…”

“…in rise in turbidity (Halder et al, 1990;Islam et al, 2021), and high values occurred during summer due to lack of rain, runoff and flood water as well as gradual settling of suspended particles (Saxena & Saksena, 2012). Rahman (1992) suggested that productive water bodies have a transparency of no more than 0.4 m. similar seasonal trends were found in the Tono reservoir (Akongyuure & Alhassan, 2021), Raipur reservoir (Saxena & Saksena, 2012) and Sardar Sarovar reservoir (Koushlesh et al, 2022).…”

“…Transparency was recorded maximum in 1.85 ± 0.33 m in the pre‐monsoon season and 1.1 ± 0.5 m the monsoon season, which indicates the rapid increase in suspended matter (silt, clay and organic matter) and sediment from the catchment areas during the monsoon season resulting in rise in turbidity (Halder et al, 1990; Islam et al, 2021), and high values occurred during summer due to lack of rain, runoff and flood water as well as gradual settling of suspended particles (Saxena & Saksena, 2012). Rahman (1992) suggested that productive water bodies have a transparency of no more than 0.4 m. similar seasonal trends were found in the Tono reservoir (Akongyuure & Alhassan, 2021), Raipur reservoir (Saxena & Saksena, 2012) and Sardar Sarovar reservoir (Koushlesh et al, 2022).…”

“…The present findings were consistent with those made by Gogoi et al (2022), who noticed that Bishalakhi Canal had low total alkalinity readings of 93.7 mg/L and Bhetkimari Canal had readings of 110.4 mg/L during the post‐monsoon season. In addition, Koushlesh et al (2022) found that the total alkalinity (96 mg/L) and total hardness (128 mg/L) levels of the Sardar Sarovar reservoir (portion inside the territory of Madhya Pradesh) were lower in the post‐monsoon and higher in the monsoon (127 mg/l and 134.45 mg/L) season. On the contrary, Johnson et al (2021) observed higher total alkalinity levels in the post‐monsoon period (134.66 and 118.0 mg/L) and the lower levels in the pre‐monsoon period (87.33 mg/L) in Halali reservoir, while Saha et al (2021) reported lower values in the monsoon period (33.2 mg/l) in Mettur reservoir.…”